EP3025660B1 - Schneidkopf für ultraschallosteotom und ultraschallosteotom damit - Google Patents

Schneidkopf für ultraschallosteotom und ultraschallosteotom damit Download PDF

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Publication number
EP3025660B1
EP3025660B1 EP14829688.2A EP14829688A EP3025660B1 EP 3025660 B1 EP3025660 B1 EP 3025660B1 EP 14829688 A EP14829688 A EP 14829688A EP 3025660 B1 EP3025660 B1 EP 3025660B1
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EP
European Patent Office
Prior art keywords
tool bit
hook
ultrasonic osteotome
arbor
end portion
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Application number
EP14829688.2A
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English (en)
French (fr)
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EP3025660A1 (de
EP3025660A4 (de
Inventor
Qun CAO
Chunyuan LI
Jianxiong SHEN
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Individual
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/32—Surgical cutting instruments
    • A61B17/3205—Excision instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/32—Surgical cutting instruments
    • A61B17/3209—Incision instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/14—Surgical saws
    • A61B17/142—Surgical saws with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/14—Surgical saws
    • A61B17/142—Surgical saws with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades
    • A61B17/144—Surgical saws with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades with cutting edges at the side of the saw blades
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/16—Instruments for performing osteoclasis; Drills or chisels for bones; Trepans
    • A61B17/1659—Surgical rasps, files, planes, or scrapers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/32—Surgical cutting instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/32—Surgical cutting instruments
    • A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/32—Surgical cutting instruments
    • A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
    • A61B2017/320072—Working tips with special features, e.g. extending parts
    • A61B2017/320074—Working tips with special features, e.g. extending parts blade
    • A61B2017/320075—Working tips with special features, e.g. extending parts blade single edge blade, e.g. for cutting

Definitions

  • the present disclosure relates to a technical field of medical equipment, in particular to an improved tool bit of ultrasonic osteotome and an ultrasonic osteotome comprising the tool bit.
  • FIG. 1A shows a typical structure of a conventional tool bit 100' of ultrasonic osteotome, which has a plurality of teeth and a wide tip, and a majority part of the tip does not constitute an effective main cutting part, as shown in Fig. 1B .
  • the tool bit 100' also has the following defects. As illustrated in Fig. 2A , when the tool bit 100' is used, a force needs to be applied to osseous tissue of a bone 200', as indicated by F1 in Fig. 2A . When the cutting operation is desired, the tool bit 100' needs to apply the force downwardly to the osseous tissue, which may not only cause a low cutting speed and a low efficiency, but also cause the tool bit with a plurality of teeth to break in operation, as indicated by F2 in Fig. 2B . However, in the process of a surgery, the tool bit 100' of ultrasonic osteotome may be inserted into tissue 300' such as marrow etc. accidentally, which brings unretrievable injury for a patient. Moreover, the tool bit 100' of ultrasonic osteotome has a complex shape and is difficult to be machined, thus, the production cost thereof is high.
  • a Chinese patent CN202740088 discloses a tool bit of an ultrasonic osteotome comprising an arbor and an end portion of the tool bit with one end of said end portion being connected to one end of said arbor, wherein said end portion of the tool bit has a hook-like shape.
  • European patent EP1736107A1 relates to a tip for a bone microsurgery of the type that comprises at least one coupling, which is adapted for connection to an actuation handpiece, which is extended by at least one stem ending with at least one head adapted to produce cuts and/or incisions, which can be oriented in all the directions of space, in the portion of bone involved, characterized in that said head has, along at least one of the lateral sides, a distribution of sharp teeth having a preset thickness, height and width.
  • the tip described in patent EP1736107A1 is particularly suitable for use in association with a handpiece of the type with pneumatic-mechanical actuation, not for in association with a handpiece of the type with ultrasonic actuatation.
  • Another Chinese patent CN202920294 discloses a tool bit of an ultrasonic osteotome comprising an arbor and an end portion of the tool bit with one end of said end portion being connected to one end of said arbor, wherein said end portion of the tool bit has a flat shape and is provided with an arc-shape portion, and a plurality of arc-shaped slot is provided in said arc-shape portion.
  • US 2010/0057118 A1 and US 2009/0318944 A1 are known tool bits for ultrasonic osteotomes with toothed cutting edges, wherein the tooth pitch may vary along the length of the cutting edge.
  • the present disclosure aims at solving the above problems in the prior art.
  • the present disclosure provides a tool bit of an ultrasonic osteotome that not only has high operating efficiency but also has high cutting speed, so as to improve the chance of success in surgery.
  • the present disclosure provides a tool bit of an ultrasonic osteotome that can be accurately positioned in operating process, so as to improve the chance of success in surgery.
  • the present disclosure also provides an ultrasonic osteotome including the tool bit as described above.
  • the hook tip can be employed to cut bones, so that cutting efficiency is high and surgery time is short. Therefore, the labour intensity of medical workers is decreased. Moreover, accurate positioning can be realized in cutting process, with no skidding, so the chance of success of surgery can be improved. Furthermore, the ultrasonic osteotome according to the embodiment of the present invention isakily and compactly designed, and the cutting amount and cutting shape for the bone can be controlled accurately, so the bone wastage resulting from cutting in surgery may be decreased. In addition, the ultrasonic osteotome according to the embodiment of the present invention has a hemostasis effect, so the amount of bleeding is decreased. Besides that, the tool bit of the ultrasonic osteotome according to the embodiment of the present invention can be machined easily with low manufacture cost.
  • the tool bit may also comprise the following additional technical features:
  • the outer side edge of said hook-shaped interconnecting piece is tooth-like.
  • the end portion of the tool bit is structured to have a tabular hook-like shape.
  • the cross section of said hook handle increases gradually in the direction from said hook-shaped interconnecting piece to said arbor.
  • the cross section of said hook tip is formed in a way that the wider end portion of said hook tip is connected with the other side of said hook valley.
  • said tool bit of the ultrasonic osteotome further includes a bit body connected to said arbor, said bit body and said arbor are connected via an arc transition, and said bit body is provided with a wrench-operation position.
  • said arbor and said end portion of the tool bit are formed as an integral part.
  • said end portion of the tool bit, said arbor and said bit body are formed as an integral part.
  • an ultrasonic osteotome comprising the tool bit mentioned above.
  • orientations or positions represented by the terms of “up”, “down”, “vertical”, “horizontal”, “top”, “bottom”, “inner” and “outer” and the like are based on the figures. It is given only by way of examples, instead of being intended to limit the device or element to have a special orientation or to be configured and operate in a special orientation. Thus, it cannot be understood as limiting of the present invention.
  • the terms of “first” and “second” are depicted only by illustration, instead of being intended to define which one is more important or to define the number of the technical features. Thereby, the features defined by the terms of “first” and “second” may literally or impliedly include one or more features.
  • the term of "a plurality of” means two or more, unless it is explained otherwise.
  • mount should be understood in broad sense, unless they are defined or provided otherwise.
  • they may be used to describe a fixed connection, or a dismountable connection or an integral connection; they may be used to describe a mechanical connection, an electrical connection; they may be used to describe direct connection or connection by intermediate medium, or communication between interiors of two elements.
  • the specific significations of the above terms in the present disclosure may be understood in the context by the skilled person in the art.
  • FIG. 3 is a schematic view showing a perspective structure of a tool bit 100 of an ultrasonic osteotome in accordance with an embodiment of the present invention.
  • Fig. 4 is a front view of the tool bit 100 of the ultrasonic osteotome in accordance with an embodiment of the present invention.
  • Fig. 5 is a top view of the tool bit 100 of the ultrasonic osteotome in accordance with an embodiment of the present invention.
  • the tool bit 100 of the ultrasonic osteotome includes an end portion 1 of the tool bit and an arbor 2.
  • the end portion 1 of the tool bit is connected to a front end of the arbor 2.
  • the end portion 1 of the tool bit has a hook-like shape, and includes a hook tip 11, a hook handle 13, as well as a hook-shaped interconnecting piece 12 which is interconnected between the hook tip 11 and the hook handle 13, as shown in Figs.3-6 .
  • the end portion 1 of the tool bit has a flat or tabular hook-like shape, as shown in Fig. 5 .
  • the end portion 1 of the tool bit includes the hook tip 11, the hook-shaped interconnecting piece 12 (or hook valley), and the hook handle 13, as shown in Fig.6 .
  • the hook handle 13 is connected with the arbor 2, and the edge of the inner side of the hook-shaped interconnecting piece 12 is tooth-like.
  • the cross section of hook handle 13 increases gradually in the direction from the hook-shaped interconnecting piece 12 to the arbor 2.
  • the cantilever strength of the hook handle 13 is enhanced during operating process.
  • the outer side edge of the hook-shaped interconnecting piece 12 is tooth-like, that is, a plurality of grooves 14 are provided on the outer side edge of the hook-shaped interconnecting piece 12. Adjacent grooves define a tooth, and a plurality of grooves define a plurality of teeth, so as to make the outer side edge of the hook-shaped interconnecting piece 12 tooth-like.
  • the cross section of hook handle 13 is increased gradually in a direction extending towards hook-shaped interconnecting piece 12. Therefore, the hook tip 11 can be employed to accelerate the cutting speed in the process of cutting, and for the reason of being hook tip, accurately positioning can be realized during cutting operation with no skidding, so the chance of success in surgery can be improved.
  • the tool bit 100 of the ultrasonic osteotome further includes a bit body 3 which is connected to the arbor 2.
  • the bit body 3 and the arbor 2 are connected via an arc transition.
  • the bit body 3 is provided with a connecting thread 4 at an end portion thereof.
  • a hexagonal wrench-operation position 5 is provided on the bit body 3, so that a tool such as wrench etc. can be employed for fixing or fastening.
  • the connecting thread 4 of this embodiment is connected to a special ultrasonic transducer (not shown) followed by the connection being tighten by a corresponding wrench. And then the ultrasonic transducer is connected to a special ultrasonic machine and thereby an ultrasonic operating may be available.
  • the arbor 2 and the end portion 1 can be formed as an integral part, so as to decrease manufacture cost.
  • the end portion 1, the arbor 2, and saidbit body 3 can be integrally formed.
  • tooth pitch D of adjacent said teeth 121 increases gradually from the hook tip to the hook handle.
  • said hooked tool bit 100 of the ultrasonic osteotome can be used the same as using a hook to hook something, or can be used as a sickle, and also can be used by means of other arbitrary mode.
  • the hook tip 11 of the end portion 1 of the hooked tool bit can be used to cut directly.
  • the hook handle 13 acts to fix a position, so as to ensure the cutting depth of the tool bit, and to protect the surrounding bone tissue.
  • said tool bit 100 of the ultrasonic osteotome can be easily positioned, and can be operated conveniently. Because said end portion 1 of the tool bit is structured to be a tabular hook-shape, it is convenient for a user to position during operation.
  • the hook tip 11 When being in use, the hook tip 11 can also be used to fix a position, and can be used to abut against an upper edge or a lower edge of a bone, then the tooth-like inner side edge of hook-shaped interconnecting 12 cuts the bone, the hook handle and hook tip act to fix a position simultaneously.
  • the direction, in which a force being exerted, is parallel to the bone surface, or extends towards upper and behind.
  • a fulcrum can be formed on basis of the hook tip 11, and a cutting can be implemented along this fulcrum.
  • Such design has an advantage that the surrounding bore tissue can be protected, and the cutting depth and cutting thickness can be controlled accurately.
  • the hook tip 11 can be extended into between spinal dural and vertebrate body (bone) to be removed, as shown in Fig.8 . Then the hook tip 11 abuts against the bone 200 and forms a fulcrum, and the hook tip 11 is operated by exerting forces from inner side to outer side. Therefore, the risk of accidentally destroying or injuring a soft issue 300 (such as spinal dural etc.) is reduced, then unrecoverable permanent damage to marrow is avoided. Therefore, the risk of surgery is decreased, and the difficulty of operation drops. This is especially suitable for removing an entire bone which can be restored later. As shown in Fig.
  • the hooked-shape tool bit 100 of the ultrasonic osteotome is used to propel the bone 200 from right to left, at this time, the hook tip 11 serves as a fulcrum and forces are exerted from left to right, therefore, even if deviation happens, the tool bit 100 of the ultrasonic osteotome will move towards outside, with the hurt to the soft tissue 300 being avoided.
  • the present invention further provides an ultrasonic osteotome comprising the tool bit as described in any of the above embodiments.
  • Said ultrasonic osteotome can be employed to cut bones by use of its hook-tip, with high efficiency and short surgery time. The labour intensity of medical workers is decreased, and accurate positioning can be realized in cutting process, with no skidding.
  • the ultrasonic osteotome according to the embodiment of the present invention isakily and compactly designed, and the cutting amount and cutting shape for the bone can be controlled accurately, so the bone wastage resulting from cutting in surgery is decreased.
  • the ultrasonic osteotome according to the embodiment of the present invention has a hemostasis effect, so the amount of bleeding is decreased.
  • the tool bit of the ultrasonic osteotome according to the embodiment of the present invention can be machined easily with low manufacture cost.
  • the terms of “an embodiment”, “some embodiments”, “exemplary embodiment”, “example”, “specific example” or “some examples” mean that the specific features, structures, materials or characteristics described in the embodiment or example may be contained in at least one embodiment or example of the present invention.
  • the exemplary expression for the above terms is not necessarily limited to the same embodiment or example.
  • the specific features, structures, materials or characteristics described may be combined in any suitable means in any of one or more embodiments or examples.

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Molecular Biology (AREA)
  • Public Health (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Dentistry (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Mechanical Engineering (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Surgical Instruments (AREA)

Claims (9)

  1. Werkzeugkopf (100) für ein Ultraschallosteotom, umfassend:
    einen Dorn (2); und
    einen Endabschnitt (1) des Werkzeugkopfes (100), der mit einem vorderen Ende des Dorns (2) verbunden ist,
    der Endabschnitt (1) des Werkzeugkopfes (100) hat eine Hakenform und umfasst eine Hakenspitze (11), einen Hakengriff (13) sowie ein hakenförmiges Verbindungsstück (12), das zwischen der Hakenspitze (11) und dem Hakengriff (13) verbunden ist,
    der Hakengriff (13) ist mit dem Dorn (2) verbunden; dadurch gekennzeichnet, dass
    eine innere Seitenkante des hakenförmigen Verbindungsstücks (12) Zähne (121) umfasst, die an der inneren Seitenkante des hakenförmigen Verbindungsstücks (12) vorgesehen sind, wobei die Zahnsteigung (D) benachbarter Zähne (121) von der Hakenspitze (11) zum Hakengriff (13) allmählich zunimmt.
  2. Werkzeugkopf (100) nach Anspruch 1, wobei eine äußere Seitenkante des hakenförmigen Verbindungsstücks (12) gezahnt ist.
  3. Werkzeugkopf (100) nach Anspruch 1, wobei der Endabschnitt (1) des Werkzeugkopfes (100) so konfiguriert ist, dass er eine flache Hakenform aufweist.
  4. Werkzeugkopf (100) nach Anspruch 3, wobei der Querschnitt des Hakengriffs (13) allmählich in der Richtung von dem hakenförmigen Verbindungsstück (13) zu dem Dorn (2) zunimmt.
  5. Werkzeugkopf (100) nach Anspruch 4, wobei der Querschnitt der Hakenspitze (11) allmählich in der Richtung zunimmt, die sich in Richtung des hakenförmigen Verbindungsstücks (12) erstreckt.
  6. Werkzeugkopf (100) nach einem der Ansprüche 1 bis 5, ferner umfassend:
    einen Kopfhauptkörper (3), der mit dem Dorn (2) verbunden ist,
    wobei der Kopfhauptkörper (3) und der Dorn (2) über einen abgerundeten Übergang verbunden sind und der Kopfhauptkörper (3) mit einem Schlüsselbetätigungsbereich (5) versehen ist.
  7. Werkzeugkopf (100) nach Anspruch 1, wobei der Dorn (2) und der Endabschnitt (1) des Werkzeugkopfes (100) als integraler Bestandteil ausgebildet sind.
  8. Werkzeugkopf (100) nach Anspruch 6, wobei der Endabschnitt (1) des Werkzeugkopfes (100), der Dorn (2) und der Kopfhauptkörper (3) als integraler Bestandteil ausgebildet sind.
  9. Ultraschallosteotom, umfassend einen Werkzeugkopf (100) nach einem der Ansprüche 1 bis 8.
EP14829688.2A 2013-07-22 2014-06-10 Schneidkopf für ultraschallosteotom und ultraschallosteotom damit Active EP3025660B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2013204350927U CN203354613U (zh) 2013-07-22 2013-07-22 一种钩形超声骨刀刀头
PCT/CN2014/079580 WO2015010506A1 (zh) 2013-07-22 2014-06-10 超声骨刀刀头和具有其的超声骨刀

Publications (3)

Publication Number Publication Date
EP3025660A1 EP3025660A1 (de) 2016-06-01
EP3025660A4 EP3025660A4 (de) 2017-01-11
EP3025660B1 true EP3025660B1 (de) 2020-11-18

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EP14829688.2A Active EP3025660B1 (de) 2013-07-22 2014-06-10 Schneidkopf für ultraschallosteotom und ultraschallosteotom damit

Country Status (9)

Country Link
US (1) US10076350B2 (de)
EP (1) EP3025660B1 (de)
JP (1) JP3205419U (de)
KR (1) KR200484760Y1 (de)
CN (1) CN203354613U (de)
AU (1) AU2014295671B2 (de)
BR (1) BR112016001234B1 (de)
ES (1) ES2841348T3 (de)
WO (1) WO2015010506A1 (de)

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Publication number Priority date Publication date Assignee Title
US20090318944A1 (en) * 2008-06-19 2009-12-24 Kenichi Kimura Ultrasonic surgical apparatus
US20100057118A1 (en) * 2008-09-03 2010-03-04 Dietz Timothy G Ultrasonic surgical blade

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JP3205419U (ja) 2016-07-28
AU2014295671A1 (en) 2016-01-28
EP3025660A1 (de) 2016-06-01
KR20160000983U (ko) 2016-03-25
US20160128716A1 (en) 2016-05-12
EP3025660A4 (de) 2017-01-11
US10076350B2 (en) 2018-09-18
CN203354613U (zh) 2013-12-25
ES2841348T3 (es) 2021-07-08
BR112016001234B1 (pt) 2021-12-07
KR200484760Y1 (ko) 2017-10-20
AU2014295671B2 (en) 2017-07-06
WO2015010506A1 (zh) 2015-01-29
BR112016001234A2 (pt) 2017-09-05

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